LTC4007_15 Datasheet, PDF (4/24 Pages) Linear Technology – 4A, High Effi ciency, Standalone Li-Ion Battery Charger

LTC4007
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range (Note 4), otherwise specifications are at T_A = 25°C. V_DCIN = 20V, V_BAT = 12V unless otherwise noted.
SYMBOL PARAMETER
V_OL
Low Logic Level of ACP, CHG, FLAG, LOBAT,
I_CL, FAULT
V_OH
High Logic Level of CHG, LOBAT, I_CL
I_OFF
Off State Leakage Current of ACP, FLAG, FAULT
I_PO
Pull-Up Current on CHG, LOBAT, I_CL
CONDITIONS
I_OL = 100μA
I_OH = –1μA
V_OH = 3V
V = 0V
MIN
TYP
MAX
l
0.5
l 2.7
–1
1
–10
Charge Termination Defeat Threshold at CHG
1
Programming Inputs (CHEM and 3C4C)
V_IH
High Logic Level
V_IL
Low Logic Level
I_PI
Pull-Up Current
V = 0V
l
l
1
3.3
–14
Oscillator
f_OSC
Regulator Switching Frequency
f_MIN
Regulator Switching Frequency in Drop Out
Duty Cycle ≥ 98%
255
300
345
20
25
DC_MAX Regulator Maximum Duty Cycle
Gate Drivers (TGATE, BGATE)
V_CSP = V_BAT
98
99
V_TGATE High (V_CLN – V_TGATE)
V_BGATE High
V_TGATE Low (V_CLN – V_TGATE)
I_TGATE = –1mA
C_LOAD = 3000pF
C_LOAD = 3000pF
50
4.5
5.6
10
4.5
5.6
10
TGTR
TGTF
BGTR
BGTF
V_BGATE Low
TGATE Transition Time
TGATE Rise Time
TGATE Fall Time
BGATE Transition Time
BGATE Rise Time
BGATE Fall Time
V_TGATE at Shutdown (V_CLN – V_TGATE)
I_BGATE = 1mA
C_LOAD = 3000pF, 10% to 90%
C_LOAD = 3000pF, 10% to 90%
C_LOAD = 3000pF, 10% to 90%
C_LOAD = 3000pF, 10% to 90%
I_TGATE = –1μA, DCIN = 0V, CLN = 12V
50
50
110
50
100
40
90
40
80
100
V_BGATE at Shutdown
I_BGATE = 1μA, DCIN = 0V, CLN = 12V
100
UNITS
V
V
μA
μA
V
V
V
μA
kHz
kHz
%
mV
V
V
mV
ns
ns
ns
ns
mV
mV
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: See Test Circuit.
Note 3: Does not include tolerance of current sense resistor or current
programming resistor.
Note 4: The LTC4007E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
4007fc
4